@Lakotaubp
Thanks a lot. It will helpfull I think.

@AlainW94
Thank you for your response. I read this post but I think it's over my capacities
I already have a version of Ubuntu on my phone. But it's the 13 and some bugs are still present.
I try again to study this post and understand the process.
Thank you again

Hey,
First i'm french so sorry for my english
I've read a lot of your posts before I decide to question you. Thank you for your work it's incredible. I thought Ubuntu touch was dead but far from that.
Brief for little talk
I think I have a problem of partition's size to install the 16.04 version of Ubuntu touch.
The installation working ok and my phone reboot but an error message appears "update... contact support".
After some researchs on your site I think it's the problem of cache/system partition's size.
But the solution is incomprehensible to me. Someone have the patience to explain to a French aficionado how to solve this problem.
Thank you for your time.